Monhysterida Filipjev, 1929

Aponchiidae Gerlach, 1963

Bodonematidae

Fusivermidae Tchesunov, 1996

Linhomoeidae Filipjev, 1922

Monhysteridae De Man, 1876

Scaptrellidae

Siphonolaimidae

Sphaerolaimidae

Xyalidae Chitwood, 1951